Tube-number record
6BU5
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BrandTung-Sol
ClassHigh Voltage Beam Pentode
BaseOctal
Filament6.3 V @ 150 mA
Construction
Primary TypeBeam tetrode / beam power
EnvelopeGlass Bulb T9 Small Cap
Sections1
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage20000 V
Plate Dissipation20 W
Grid 2 Voltage700 V
Grid 1 Voltage-50 V
Cathode Current2.5 mA
H-C Voltage200 V
Audio Performance
Key Features
- High Voltage Beam Pentode
- Shunt Voltage Regulator
- Sharp Cut-off Characteristic
- Low Current Requirements
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Average Characteristics 1 | 20000 V | — | — | — | 0.55 mA |
| Average Characteristics 2 | 20000 V | — | — | — | 1 mA |
| Cut-off Characteristic | 20000 V | — | — | — | 0.03 mA |
Application Notes
Designed primarily for use as a shunt voltage regulator in the high voltage power supply of color television receivers. High voltage operation can result in the production of X-rays which constitute a health hazard unless adequately shielded.
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